Communication apparatus, base station, and communication method

Abstract

A communication method includes the steps of: obtaining, from a base station, a system information block indicating a plurality of TRS resource set configurations in a radio resource control (RRC) idle state or an RRC inactive state; and receiving the TRS from the base station using a TRS resource set configuration selected from the plurality of TRS resource set configurations. The system information block includes condition information that specifies a condition under which the communication apparatus can select the TRS resource set configuration for each TRS resource set configuration.

1 . A communication apparatus comprising:
 a receiver configured to:   receive from a base station, system information including a parameter and a parameter list, the parameter indicating one value of power offset configured to more than one Tracking Reference Signal (TRS) resource, the power offset being a power offset of the TRS with respect to a synchronization signal, the parameter list indicating more than one value of scrambling identifier, each value of the more than one value of scrambling identifier being configured to each TRS resource of the more than one TRS resource, and   a controller configured to control reception of the TRS based on the parameter and the parameter list in a case where the communication apparatus is in a RRC idle state or a RRC inactive state, a validity duration is configured for TRS availability indication for the more than one TRS resource, and downlink control information including the TRS availability indication is received.   
     
     
         2 . The communication apparatus according to  claim 1 , wherein
 the system information further includes:   a parameter indicating one value of TRS periodicity-and-offset configured to the more than one TRS resource, and   a parameter indicating one value of Quasi Co-Location (QCL) configured to the more than one TRS resource,   the controller is configured to control reception of the TRS based on the parameter indicating the one value of the power offset, the parameter indicating the one value of the TRS periodicity-and-offset, the parameter indicating the one value of the QCL and the parameter list.   
     
     
         3 . The communication apparatus according to  claim 1 , wherein
 the system information includes information configuring the validity duration.   
     
     
         4 . A base station comprising:
 a transmitter configured to:   transmit to a communication apparatus, system information including a parameter and a parameter list, the parameter indicating one value of power offset configured to more than one Tracking Reference Signal (TRS) resource, the power offset being a power offset of the TRS with respect to a synchronization signal, the parameter list indicating more than one value of scrambling identifiers, each value of the more than one value of scrambling identifier being configured to each TRS resource of the more than one TRS resources, and   a controller configured to control transmission of the TRS based on the parameter and the parameter list in a case where the communication apparatus is in a RRC idle state or a RRC inactive state, a validity duration is configured for TRS availability indication for the more than one TRS resource, and downlink control information including the TRS availability indication is transmitted.   
     
     
         5 . The base station according to  claim 4 , wherein
 the system information further includes:   a parameter indicating one value of TRS periodicity-and-offset configured to the more than one TRS resource, and   a parameter indicating one value of Quasi Co-Location (QCL) configured to the more than one TRS resource,   the controller is configured to control transmission of the TRS based on the parameter indicating the one value of the power offset, the parameter indicating the one value of the TRS periodicity-and-offset, the parameter indicating the one value of the QCL and the parameter list.   
     
     
         6 . The base station according to  claim 4 , wherein
 the system information includes information configuring the validity duration.   
     
     
         7 . A communication method executed by a communication apparatus, the communication method comprising:
 receiving from a base station, system information including a parameter and a parameter list, the parameter indicating one value of power offset configured to more than one Tracking Reference Signal (TRS) resource, the power offset being a power offset of the TRS with respect to a synchronization signal, the parameter list indicating more than one value of scrambling identifier, each value of the more than one value of scrambling identifier being configured to each TRS resource of the more than one TRS resource, and   controlling reception of the TRS based on the parameter and the parameter list in a case where the communication apparatus is in a RRC idle state or a RRC inactive state, a validity duration is configured for TRS availability indication for the more than one TRS resource, and downlink control information including the TRS availability indication is received.   
     
     
         8 . The communication method according to  claim 7 , wherein
 the system information further includes:   a parameter indicating one value of TRS periodicity-and-offset configured to the more than one TRS resource, and   a parameter indicating one value of Quasi Co-Location (QCL) configured to the more than one TRS resource, and   controlling reception of the TRS comprising controlling reception of the TRS based on the parameter indicating the one value of the power offset, the parameter indicating the one value of the TRS periodicity-and-offset, the parameter indicating the one value of the QCL and the parameter list.   
     
     
         9 . The communication method according to  claim 7 , wherein
 the system information includes information configuring the validity duration.